Hi All,

If you have problem like me  to add second interface to your Kali Linux here’s the weird fix.

Delete the ‘Wired Connection 1’ file

Kali1

Then add the interfaces again.Be careful to choose the right MAC address for the NIC.

Kali2

And the result;

 

Hope it helps…

 

Ref:https://forums.kali.org/showthread.php?29657-Only-one-of-multiple-wired-interfaces-(eth0-eth1-etc)-can-be-active-at-a-time  #5